X0303 4 2010-03-03 0 0001393818 Blackstone Group L.P. BX 0001249319 HILL J TOMILSON C/O THE BLACKSTONE GROUP 345 PARK AVENUE NEW YORK NY 10154 1 1 0 0 Vice Chairman Common units representing limited partnership interests 2010-03-03 4 C 0 674052 0 A 1686105 D Common units representing limited partnership interests 2010-03-03 4 C 0 75948 0 A 75948 I See footnote. Common units representing limited partnership interests 2010-03-03 4 S 0 779561 14.36 D 906544 D Common units representing limited partnership interests 2010-03-03 4 S 0 69184 14.36 D 6764 I See footnote. Common units representing limited partnership interests 2010-03-04 4 S 0 76223 14.23 D 830321 D Common units representing limited partnership interests 2010-03-04 4 S 0 6764 14.23 D 0 I See footnote. Blackstone Holdings partnership units 2010-03-03 5 G 0 36618 0 D Common units representing limited partnership interests 36618 9969406 D Blackstone Holdings partnership units 2010-03-03 4 C 0 674052 0 D Common units representing limited partnership interests 674052 9295354 D Blackstone Holdings partnership units 2010-03-03 4 C 0 75948 0 D Common units representing limited partnership interests 75948 6336348 I See footnote. Blackstone Holdings partnership units Common units representing limited partnership interests 1500000 1500000 I See footnote. A "Blackstone Holdings partnership unit" collectively refers to one limited partner interest in each of Blackstone Holdings I L.P., Blackstone Holdings II L.P., Blackstone Holdings III L.P. and Blackstone Holdings IV L.P. Subject to the minimum retained ownership requirements and transfer restrictions set forth in the partnership agreements of the Blackstone partnerships, the Reporting Person has the right, exercisable from time to time, to exchange each Blackstone Holding partnership unit for one common unit of The Blackstone Group L.P. The Blackstone Holdings partnership units have no expiration date and may not be exchanged at any time prior to December 31, 2010 other than pursuant to transactions or programs approved by Blackstone. The Reporting Person donated 36,618 Blackstone Holdings partnership units to a charitable foundation. Pursuant to an exchange agreement, the Reporting Person exchanged 674,052 Blackstone Holdings partnership units for an equal number of common units of The Blackstone Group L.P. and thereafter sold such 674,052 common units plus an additional 181,732 common units he previously acquired over two consecutive trading days. Pursuant to an exchange agreement, a trust, for which the Reporting Person is trustee with investment power, exchanged 75,948 Blackstone Holdings partnership units for an equal number of common units of The Blackstone Group L.P. and thereafter sold such 75,948 common units over two consecutive trading days. These Blackstone Holdings partnership units are held in trusts, for the benefit of the Reporting Person's children, of which the Reporting Person is a trustee with investment power. The Reporting Person disclaims beneficial ownership of the Blackstone Holdings partnership units held in these trusts. Such Blackstone Holdings partnership units are held in a Grantor Retained Annuity Trust, for which the spouse of the Reporting Person is the investment trustee. Pursuant to Rule 16a-1(a)(4) of the Securities Act of 1934, as amended, the Reporting Person states that this filing shall not be deemed to be an admission that he is the beneficial owner of the securities reported herein, and the Reporting Person disclaims beneficial ownership of such securities, except to the extent of his pecuniary interest therein. Robert L. Friedman, Attorney-in-Fact 2010-03-05